package rj.servlet.sy4;



import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
@WebServlet(name = "LastAccessServlet", urlPatterns = {"/lastAccess"})
public class LastAccessServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=utf-8");
        String lastAccessTime = null;
        // 获取所有的cookie，并将这些cookie存放在数组中
        Cookie[] cookies = request.getCookies();                            ;
        // 遍历cookies数组
        for (int i = 0; cookies != null && i < cookies.length; i++) {
            if ("lastAccess".equals(cookies[i].getName())) {
                // 如果cookie的名称为lastAccess,则获取该cookie的值
                lastAccessTime = cookies[i].getValue();
                break;
            }
        }
        // 判断是否存在名称为lastAccess的cookie
        if (lastAccessTime == null) {
            response.getWriter().print("您是首次访问本站！！！");
        } else {
            response.getWriter().print("您上次的访问时间是： " + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(Long.parseLong(lastAccessTime))));
        }
        // 创建cookie,将当前时间作为cookie的值发送给客户端
        String currentTime = String.valueOf(System.currentTimeMillis());
        Cookie cookie = new Cookie("lastAccess", currentTime);
        // 发送 cookie
        response.addCookie(cookie);
    }
    public void doPost(HttpServletRequest req, HttpServletResponse resp)  throws
            ServletException, IOException {
        this.doPost(req, resp);
    }
}

